Iptables bug?!

Hi, I'm using suse 7.3 and iptables v1.2.2. Performing a prerouting operation like the folowing one: iptables -t nat -A PREROUTING -p tcp --dport 139 -i ppp0 -j DNAT --to 192.168.1.5:139 I got an anomaly because even though it's really working fine it goes on to forward the packets when removed by this: iptables -t nat -D PREROUTING -p tcp --dport 5900 -i ppp0 -j DNAT --to 192.168.1.5:5900 I couldn't explain that such iptables' behaviour....is here anyone who can? Thank you, Fabrizio --------------------------------- Yahoo! Cellulari: loghi, suonerie, picture message per il tuo telefonino